Introduction: Effectiveness of vibratory stimulus from a commonly available battery-powered tooth brush in accelerating orthodontic tooth movement was tested by a randomized controlled split-mouth study. Materials and Methods: Twenty-three subjects with bimaxillary protrusion, requiring extraction of all first premolars and requiring maximum anchorage, were chosen. After initial leveling and aligning, miniscrews were placed between the first molar and the second premolar in the maxillary right and left quadrants and loaded with 150-g nickel–titanium closed-coil springs for individual canine retraction. Additional 5 min of vibratory stimulus thrice daily was applied on the experimental side. The mean treatment duration was 3 months. Results: There was no significant difference of means of the canine distal movement between the experimental and the control sides ( P = 0.70). Conclusion: Application of vibratory stimulus with powered tooth brush during canine retraction was not seen to have an acceleratory effect on orthodontic tooth movement.

Introduction In the last decade, anchorage control with mini-implants has gained enormous credibility in maintaining orthodontic anchorage. Resonance frequency analysis (RFA) has proven to be an adequate method to measure the stability of these mini-implants because of its non-invasiveness and contactless measurement method. Materials and Method Tomas and S.K surgical mini-implants were tested. For this purpose custom fabricated attachment was fabricated to attach the smart peg on orthodontic mini-implant head, and 45 mini-implants were inserted in fresh swine pelvic bone in the density matched sites to that of most common sites where mini-implants are placed in human mandible. Mini-implants of two different lengths with diameter constant were also placed to assess the effect of length on primary stability. Results The mean ISQ of Group 1 (Tomas 10 mm) was 55.53±3.39 while that of Group 2 (S.K Surgical 10mm) was 56.63±3.48 and that of Group 3(S.K Surgical 8 mm) was 55.90±3.48. Difference among the groups were not statistically significant when ANOVA test was used (P >0.05). Conclusion The resonance frequency analysis is applicable to comparatively assess the primary stability of orthodontic mini-implants. There was no difference in primary stability of Tomas and S.K Surgical mini-implant and primary stability was not affected by the length of the mini-implant.

Purpose: To determine if biostimulation using a 810 nm diode laser was capable of affecting the rate of extraction space closure during orthodontic treatment. Materials and methods:Forty dental arches of patients above 17 years of age requiring bilateral first premolar extractions were exposed to a 810 nm diode laser with a power density of 3.97 W/cm 2 at 3 weeks intervals for total duration of 12 weeks during the space closure phase under direct anchorage using miniscrews. Space closure measurements were taken using digital calipers and the unpaired t-test was used to compare the differences between the experimental and control sides. Results:The rate of orthodontic tooth movement was greater on the experimental side and the difference between the two sides was statistically significant (p < 0.001). Conclusion:Biostimulation carried out using a 810 nm diode laser is capable of increasing the rate of extraction space closure in humans. Hence, it can be concluded that it is capable of increasing the rate of orthodontic tooth movement.

Correction of Class II malocclusion without extractions requires maxillary molar distalization by means of intraoral or extraoral forces. Although headgears have proven undoubtly useful in the correction of this skeletal anomaly. the constancy of forces and the dependence on patient co-operation is of concern.Since the 1980s various intra arch devices have been introduced such as the K loop (V. Kalra). NiTi coil springs (Gianelly). Superelastic NiT! wires (Locatelli) . Repelling magnets (Gianelly) . Fixed Piston appliance (Greenfield). Pendulum appliance (Hilgers) . Lokar Distalizer (SCOII). Distal Jet (Carano) as well as combination of extraoral and intraoral b rces (Cetlin and Tenhoeve) . Researchers have bcused on the simplicity and efficiency of Ihese intraarch devices. which improves the continuity and constancy of forces. Oral hygiene is easier to maintain and the need for patient compliance is eliminated . A modified Nance appliance has olten been applied in conjunction with these force delivery systems to increase anchorage during distal movement or keep the molars in position fonowing distal movement. This paper presentation is an anempt to update information regarding various intra oral distalizing appliances available currently and discusses patients treated successfully by using NiTi coil springs (Ortho organizer) by distalization for correction of class II molar relationship.

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